Earthquake jtai: 06/15/2004 11:16:31 GMT, M=6.1, S38.81 W73.06, 41.0km depth, Bias: pga=0.00 pgv=0.00 Seismic Stations Explanation of Flags M - Manually flagged T - Outlier G - Amplitude off scale or below noise I - Incomplete data N - Not in list of known stations